Green’s Dictionary of Slang

1. a lump of phlegm.

1941

1950196019701980

1982

1941		Baker Popular Dict. Aus. Sl.
1982		P. Radley My Blue-Checker Corker 65: ‘Not just little-old-lady spits either,’ Duck reported. ‘They’re really dirty big old snotty gollions. All yellow muck’.

2. a term of abuse.

1949

1950196019701980

1982

1949		R. Park Poor Man’s Orange 187: What are you grinning at, you big gollion?
1982		P. Radley My Blue-Checker Corker 24: ‘You gollion...you’ll never learn’.